Marcia C. Barbosa is a Brazilian physicist. Born in Rio de Janeiro, Brazil, did her high school at Colégio Marechal Rondon in Canoas, Rio Grande do Sul, Brazil, undergraduate and graduate studies at the Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil. After getting her PhD she spent two years as a postdoc at the research group of Michael Fisher at the University of Maryland. Back in Brazil she got a permanent position at the UFRGS where she is working until today.,as Full Professor of Physics. 

She is a researcher with publications, thesis advised and organization of schools and international conferences.Barbosa was named 2013 L'Oréal-UNESCO For Women in Science Awards Laureate for Latin America for discovering one of the peculiarities of water which may lead to better understanding of how earthquakes occur and how proteins fold which is important for the treatment of diseases.